Improved mode of prim ng repeating fire-arms



2 SheetsSheet 1.

G. R. CROOKER.

Revolver.

Patented Oct. 20, 1857.

SSE

N PETERS. PHOTO-LWHOGRAPMER, WASHINGTON. D c.

2 SheetsSheetv 2.

G. R. CROOKER.

Revolver.

No. 18,486. Patented Oct. 20, 1857.

N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, 0 C

UNITED STATES PATENT OFFICE.

GEO. n. eRooKEn, OF NEW YORK, ASSIGNOR TO GEO. e. MARTIN, or BROOK.

LYN, N. Y.

IMPROVED MODEOF PRIM'NG REPEATING FIRE-ARMS.

Specification forming part of Letters Patent No. 18,486, dated October20, 1857.

To all whom it may concern:

Be it known that I, G. R. UROOKER, ol' the city, county, and State ofNew York, have invented certain new and useful Improvements in PrimingRepeating Fire-Arms; and I do hereby declare and ascertain saidimprovements, referring to theaccompanyingdrawings in illustrationthereof, in which- Figure l is a general view of the improvement appliedto the well-known Oolts revolver. Fig. 2 is a section of the stock andcylinder or revolving breech. Fig. 3 is a perspective view of the latterdetached; Fig. 4, a portion of the stock, showing the opening throughwhich the piece is primed; Fi 5, the priming-chamher.

llrlyimprovement is mainly designed for the arm well known as Oolts, butwill also serve for any other revolvingbreech repeating-arm.

The construction is as follows: The arm can be formed in all particularslike the wcllknown arm above named, except in the details hereinaftermentioned. Therefore a full description thereof need not be given.Instead of forming recesses and inserting nipples or cones to receivepercussioncaps, I form the rear end of the cylinder a conical by turningoff the end at an angle, as at a, and form therein small recesses I),through the bottom of which communication is made with the chamber ofthe barrel, as seen in Figs. 2 and 3. The butt against which therevolving cylinder a rests projects around the edge, just to fit thecylinder, as at c, the two being exactly fitted to each other. On theside of the stock, behind the cylinder a, I form a small chamber orcylindrical hole, 0, the distance of which from the point where thehammer strikes being the same as the distance of the recesses b apart,so that when the revolving breech or' cylinder to is brought to theproper position to be discharged the opening of the chamber 6 is exactly opposite the recess next succeeding.

Within the chamber 6, I put a cylindrical piece of priming, formed onthe plan and of the material devised by D. G. Rollin, a description ofwhich is not necessary here, further than to say that it is in the formof a small cylinder ture of cutting ofi" the percussion charge by therevolution of the cylinder, or some equivalent therefor, by placing thechamber over the recess 1), into which the priming is forced orprojected, so as to he cut ofi' in its proper position. When the end ofthe piece of percus- 7 sion-priming is thrust into the recess, if thepiece is revolved, the edges of the recess, coming in close contact withthe end of the chamber, act as a shear to cut ott' that portion of thepriming within the recess, in which it is conveyed around under thehammer, to be exploded in the ordinary way. Thus, as each chamberrevolves around each of the recesses bin succession receive their chargeol' priming without any other or more complex mechanism.

It will be obvious that when this priming is used for ordinary arms thechamber cont-aining the priming can be made to slide over the recessinstead of revolving the recess under the chamber, and the portion usedfol priming cut ott'in the same or asimilar manner to that where thebreech revolves. A further descrip tion of the particulars of thisdevice need not therefore be given.

Having thus fully described my new method of priming repeating and otherfire-arms, what I claim therein as new, and for which I desire to secureLetters Patent, is

The method herein described of depositing the percussion-priming andcutting it off in the recess in the breech, as set forth, constituting aself-primin g apparatus, constructed and operating as above specified.

GEO. R. GROOKER.

Witnesses:

ALB. H. HOUK, HEZEKIAH BRADFORD.

